错误:“填充:SelectCommand.Connection属性尚未初始化." [英] Error : "Fill: SelectCommand.Connection property has not been initialized."
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问题描述
im在尝试将mysql数据库连接到编辑器时出现此错误，这是后面的代码:
im getting this error while trying to connect a mysql database to an editor, here is the code behind:
protected void Button1_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
MySqlConnection conn = new MySqlConnection(@"connection string");//tested and working
conn.Open();
MySqlCommand cmd = new MySqlCommand("SELECT tes FROM ins");
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
da.SelectCommand = cmd;
da.Fill(dt);
if (dt.Rows.Count > 0)
{
Editor1.Content = dt.Rows[0]["tes"].ToString();
}
conn.Close();
}
这是aspx页面代码:
and here is the aspx page code:
<body>
<form id="form1" runat="server">
<cc1:Editor ID="Editor1" runat="server" Height="400px" Visible="true" />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
我在做错什么，谢谢.
我正在使用asp.net 3.5.
推荐答案
更改行
MySqlCommand cmd = new MySqlCommand("SELECT tes FROM ins");
收件人
MySqlCommand cmd = new MySqlCommand("SELECT tes FROM ins", conn);
它应该可以工作.
或者将conn分配给cmd.Connection属性.
Alternatively assign conn to the cmd.Connection property.
您的代码存在问题，就是您永远不会为该命令分配连接，因此该错误表明该连接未初始化.
The problem with your code is that you never assign a connection to the command, hence the error saying that the connection is not initialized.
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